package com.sky.controller.user;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.RedisConstant;
import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.service.RedisService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author moningxi
 */
@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Resource
    private RedisService redisService;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        // 先查询缓存
        String key = RedisConstant.SHOP_DISH + categoryId;
        String jsonString = (String) redisService.getString(key);
        List<DishVO> dishVOS = JSONObject.parseObject(jsonString, List.class);
        if (dishVOS != null) {
            return Result.success(dishVOS);
        }

        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品

        List<DishVO> list = dishService.listWithFlavor(dish);

        if (list.isEmpty()) {
            // 防止缓存穿透
            redisService.saveString(key, JSONObject.toJSONString(list), RedisConstant.SHOP_DISH_ISNULL_TTL);
        } else {
            // 存入缓存
            redisService.saveString(key, JSONObject.toJSONString(list));
        }

        return Result.success(list);
    }

}
